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You can easily add page breaks in rows and columns for files in OpenXML (.xlsx) format using the PageBreak and PageBreak properties.
Add a reference to C1.WPF.Excel.dll or C1.Silverlight.Excel.dll and create a C1XLBook.
// Create a new workbook to be saved
C1XLBook book = new C1XLBook();
Add some text values and page breaks using the following code:
book.Sheets[0][2, 3].Value = "page1";
book.Sheets[0].Rows[2].PageBreak = true;
book.Sheets[0][0, 1].Value = "test1";
book.Sheets[0][0, 2].Value = "test2";
book.Sheets[0].Columns[1].PageBreak = true;
book.Sheets[0][3, 3].Value = "page2";
Save and open the .xlsx file.
// Save and open the file
book.Save(@"C:\test.xlsx");
System.Diagnostics.Process.Start(@"C:\test.xlsx");
In Excel, select the Page Layout tab, and select the Print checkbox under Gridlines. The worksheet should look similar to the following: